Interactive Video - DNA Function and Structure

What is heredity about?

• How plants grow

• How animals are trained

• How traits are passed from parents to offspring

• How diseases are cured

What does DNA stand for?

• Dinucleotide Acid

• Deoxynucleotide Acid

• Dinucleic Acid

• Deoxyribonucleic Acid

DNA falls into the big molecule category called ​ (a)   . They are made of building blocks called ​ (b)   .

• nucleic acids
• carbohydrates
• fats
• proteins
• nucleotides
• simple sugars
• fatty acids
• amino acids

The nitrogenous bases in DNA are what make up the code in all of our genes. What are the four bases found in DNA (first letters of the names)?

• ATCG

• SPBN

• BUWZ

• HLPZ

Answer explanation

​ All living things contain DNA and it is similar in structure, no matter what species we choose. The amount of DNA and the sequence (specific order) of the bases are two things that do differ between species of living organisms.

• True

• False

If you look at DNA and picture the shape of it as a twisted ladder, how many strands (sides of the ladder) does it have?

• 2

• 4

• 6

The bases are paired up in the middle of the DNA molecule. They are held together by ___ bonds.

• Covalent

• Ionic

• Hydrogen

What is the shape of DNA?

• Quadruple helix

• Single helix

• Double helix

• Triple helix

We know the genes in our DNA code for our traits. What specific molecule does our DNA code for, which influences what are our traits will be?

• Fats

• Proteins

• Sugars